Which stage of Giardia is pear-shaped with two nuclei and flagella?

Prepare for Success! In Clinical Laboratory Science with our Parasitology Test. Study with flashcards, multiple choice questions, hints, and explanations. Boost your readiness for the exam!

Multiple Choice

Which stage of Giardia is pear-shaped with two nuclei and flagella?

Explanation:
The stage Giardia is asking about is the trophozoite. This form is the active, feeding stage that moves by means of multiple flagella and attaches to the intestinal lining with a ventral adhesive disc. It is characteristically pear-shaped and contains two nuclei, which is a hallmark feature of the trophozoite form. In contrast, the cyst form is environmentally resistant and typically oval or round, with four nuclei, and is the infectious stage excreted in feces. The oocyst is not a Giardia stage, and eggs are not part of Giardia’s life cycle. So the description of a pear-shaped body with two nuclei and flagella points to the trophozoite.

The stage Giardia is asking about is the trophozoite. This form is the active, feeding stage that moves by means of multiple flagella and attaches to the intestinal lining with a ventral adhesive disc. It is characteristically pear-shaped and contains two nuclei, which is a hallmark feature of the trophozoite form.

In contrast, the cyst form is environmentally resistant and typically oval or round, with four nuclei, and is the infectious stage excreted in feces. The oocyst is not a Giardia stage, and eggs are not part of Giardia’s life cycle. So the description of a pear-shaped body with two nuclei and flagella points to the trophozoite.

More Multiple Choice Questions
Subscribe

Get the latest from Passetra

You can unsubscribe at any time. Read our privacy policy